[en] The paper presents a novel 6th order continuous-time, force-feedback band-pass sigma-delta modulator control system for the detection mode
of micromachined vibratory gyroscopes. Compared with the architecture using a low-pass sigma-delta modulator, this band-pass solution uses a
much lower sampling frequency for the sigma-delta modulator and thus reduces the requirement for frequency response of the detection interface
and control electronics. In this work, the sigma-delta modulator operates at only four times of mechanical resonant frequency, which allowed its
implementation in a continuous-time circuit using discrete electronic components on a PCB; this has the advantage of simple prototyping and can
improve the signal anti-aliasing characteristics.
Disciplines :
Electrical & electronics engineering
Author, co-author :
Dong, Yufeng
Kraft, Michaël ; Université de Liège - ULiège > Dép. d'électric., électron. et informat. (Inst.Montefiore) > Systèmes microélectroniques intégrés
Hedenstierna, N.
Redman-White, William
Language :
English
Title :
Microgyroscope control system using a high-order band-pass continuous-time sigma-delta modulator
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